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Merge pull request #3740 from MichaelEischer/fix-restore-size-stats

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Fix restore size calculation for multiple snapshots
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MichaelEischer 2022-05-09 21:39:45 +02:00 committed by GitHub
commit ab49c14621
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2 changed files with 13 additions and 9 deletions
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8
changelog/unreleased/issue-3736 Normal file
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@ -0,0 +1,8 @@
Bugfix: `stats` fix restore size calculation for multiple snapshots
Since restic 0.10.0 the restore size calculated by the `stats` command for
multiple snapshots was too low. The hardlink detection was accidentally applied
across multiple snapshots and thus ignored many files. This has been fixed.
https://github.com/restic/restic/issues/3736
https://github.com/restic/restic/pull/3740

14
cmd/restic/cmd_stats.go
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@ -111,7 +111,6 @@ func runStats(gopts GlobalOptions, args []string) error {
// create a container for the stats (and other needed state) // create a container for the stats (and other needed state)
stats := &statsContainer{ stats := &statsContainer{
uniqueFiles: make(map[fileID]struct{}), uniqueFiles: make(map[fileID]struct{}),
uniqueInodes: make(map[uint64]struct{}),
fileBlobs: make(map[string]restic.IDSet), fileBlobs: make(map[string]restic.IDSet),
blobs: restic.NewBlobSet(), blobs: restic.NewBlobSet(),
snapshotsCount: 0, snapshotsCount: 0,
@ -175,7 +174,8 @@ func statsWalkSnapshot(ctx context.Context, snapshot *restic.Snapshot, repo rest
return restic.FindUsedBlobs(ctx, repo, restic.IDs{*snapshot.Tree}, stats.blobs, nil) return restic.FindUsedBlobs(ctx, repo, restic.IDs{*snapshot.Tree}, stats.blobs, nil)
} }
err := walker.Walk(ctx, repo, *snapshot.Tree, restic.NewIDSet(), statsWalkTree(repo, stats)) uniqueInodes := make(map[uint64]struct{})
err := walker.Walk(ctx, repo, *snapshot.Tree, restic.NewIDSet(), statsWalkTree(repo, stats, uniqueInodes))
if err != nil { if err != nil {
return fmt.Errorf("walking tree %s: %v", *snapshot.Tree, err) return fmt.Errorf("walking tree %s: %v", *snapshot.Tree, err)
} }
@ -183,7 +183,7 @@ func statsWalkSnapshot(ctx context.Context, snapshot *restic.Snapshot, repo rest
return nil return nil
} }
func statsWalkTree(repo restic.Repository, stats *statsContainer) walker.WalkFunc { func statsWalkTree(repo restic.Repository, stats *statsContainer, uniqueInodes map[uint64]struct{}) walker.WalkFunc {
return func(parentTreeID restic.ID, npath string, node *restic.Node, nodeErr error) (bool, error) { return func(parentTreeID restic.ID, npath string, node *restic.Node, nodeErr error) (bool, error) {
if nodeErr != nil { if nodeErr != nil {
return true, nodeErr return true, nodeErr
@ -242,8 +242,8 @@ func statsWalkTree(repo restic.Repository, stats *statsContainer) walker.WalkFun
// if inodes are present, only count each inode once // if inodes are present, only count each inode once
// (hard links do not increase restore size) // (hard links do not increase restore size)
if _, ok := stats.uniqueInodes[node.Inode]; !ok || node.Inode == 0 { if _, ok := uniqueInodes[node.Inode]; !ok || node.Inode == 0 {
stats.uniqueInodes[node.Inode] = struct{}{} uniqueInodes[node.Inode] = struct{}{}
stats.TotalSize += node.Size stats.TotalSize += node.Size
} }
@ -290,10 +290,6 @@ type statsContainer struct {
// contents (hashed sequence of content blob IDs) // contents (hashed sequence of content blob IDs)
uniqueFiles map[fileID]struct{} uniqueFiles map[fileID]struct{}
// uniqueInodes marks visited files according to their
// inode # (hashed sequence of inode numbers)
uniqueInodes map[uint64]struct{}
// fileBlobs maps a file name (path) to the set of // fileBlobs maps a file name (path) to the set of
// blobs that have been seen as a part of the file // blobs that have been seen as a part of the file
fileBlobs map[string]restic.IDSet fileBlobs map[string]restic.IDSet